9 Feb
2016
9 Feb
'16
6:56 p.m.
Jake,
On Tue, Feb 9, 2016 at 11:27 AM, Noel Chiappa <jnc
at mercury.lcs.mit.edu>
....
> Really, it's not that hard to upgrade an
H9270-A (or the H9273-A in a
> BA11-N)
> to Q22 (I have done several of the latter); the transplant you speak of
> (were
> it possible) is on the same order of magnitude of work.
>
> Noel
On Tue, Feb 09, 2016 at 01:36:24PM -0500, Jacob Ritorto wrote:
So, since grafting in the Micro backplane would
involve butcher work, I'm
now wholeheartedly convinced that I should be moving to your setup with the
BA11-N/S boxes, Noel. And I'm sold on the Q-22 backplane conversion
(despite failing the first time I tried it years ago). Going to study what
prints I have, review previous advice and go for it.
Thank you for all the tips and hand-holding!
I just did this conversion to an oddball dual-wide backplane, and
it was extremely was easy. I used a bag of 50 pre-cut wire-wrap
jumpers which were a few dollars from Jameco or Digikey.
This page (which even mentions Noel!) has clear information and
pictures identifying the four pins involved:
http://web.frainresearch.org:8080/projects/pdp-11/conv22.php
Mark
--
Mark G. Thomas (Mark at Misty.com), KC3DRE